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    <title>Document</title>
    <script>
        //利用对象封装自己的数学对象  里面有PI最大值和最小值
        var myMath = {
            PI:3.141592653,
            max: function() {
                var max = arguments[0];
                for (var i = 1;i<arguments.length;i++){
                    if(arguments[i]>max){
                        max = arguments[i];
                    }
                }
                return max;
            },
            min:function() {
                var min = arguments[0]; 
                for (var i = 1;i<arguments.length;i++){
                    if(arguments[i]<min){
                        min = arguments[i];
                    }
                }
                return min;
        }
    }
        console.log(myMath.PI);
        console.log(myMath.max(1,5,9));
        console.log(myMath.min(1,5,9));
    </script>
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